Date: Fri, 1 Sep 2006 18:37:03 -0700 From: "Josh Carroll" <josh.carroll@psualum.com> To: freebsd-current@freebsd.org Subject: Re: atapi/IDE DVD problem Message-ID: <8cb6106e0609011837r7af17fe1s67c5f5c514869a52@mail.gmail.com> In-Reply-To: <8cb6106e0608311341v2170440fy6247cfb01db47490@mail.gmail.com> References: <8cb6106e0608301317y21a131a4q6fe78b3a2565a9b7@mail.gmail.com> <8cb6106e0608301940j63391a40mdb92b4df2d5ea4a1@mail.gmail.com> <8cb6106e0608311341v2170440fy6247cfb01db47490@mail.gmail.com>
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Further debugging, and probably something I should have done FIRST, reveals that this is a DMA problem. Setting: hw.ata.atapi_dma=0 in /boot/loader.conf works around the problem. I found a thread where Søren fixed a problem with atapi DMA back in January/February (and the patch looks like it was merged at some point): http://lists.freebsd.org/pipermail/freebsd-current/2006-January/060236.html I believe I'm having a problem with this JMicron controller because it's not being identified as a legacy device by the ata_legacy function. The only reason I can think of for this is that it's a 3rd party card and showing up as: atapci0@pci2:0:0: In pciconf -l -v output. I don't know if it's entirely related (indirectly perhaps?) to the IRQ of the ata controller, but in my case it's on irq16 not irq14 or irq15. Is there a quick workaround for this? Or am I stuck without DMA on the DVD drive until Søren has time to work on the full solution mentioned in the thread above? Thanks and sorry for all the replies. I figured the more info I can provide, the easier it is to help. Regards, Josh
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